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Cisco Systems OL-8241-02 Manual De Usuario

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3-3
Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-8241-02
Chapter 3      Configuring Open Shortest Path First
OSPF Overview
OSPF Routing Hierarchy
The OSPF routing hierarchy includes the following functions:
•
Autonomous systems
•
Areas, including the backbone and stub areas
•
Area Border Routers (ABRs)
•
Autonomous System Boundary Routers (ASBRs)
 illustrates an OSPF network topology.
Figure 3-1
Basic OSPF Network Topology
Router3
Router5
AS
Boundry
Router2
Router1
(CSS)
Router4
Router2
AS
Boundry
Router1
Area
Border
Router1
Area
Border
Router2
Autonomous System A (AS A)
Autonomous System B (AS B)
Area 1.1.1.1
Area 0.0.0.0 (backbone)
Area 1.1.1.2
(stub area)
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